so im wondering what i could use to put in it to take up that airspace.

would a cardboard box taped up work? or would the sound waves actually go through it. i could fill the box with towels?

or should i go buy some more wood and build a box that takes up that much cft and screw in it?

fatboyracing

01-16-2009, 11:46 AM

coult you put some mdf in it

Ford302Redneck

01-16-2009, 11:46 AM

2x4s,2x6s.2x8s.

But .765.

Isn't going to make "that much difference".

Thats less than .2 per sub.

PaulThompson229

01-16-2009, 11:46 AM

That little bit of extra space shouldn't hurt your output that much. Is is tuned right? Have you checked for air leaks?

bvr_j_0969

01-16-2009, 11:47 AM

12X12X9 1/8 cube comes out to be .76 cft or very close

bvr_j_0969

01-16-2009, 11:48 AM

ive checked everything the tuning is right, no air leaks , no box flex

SavageBlackout

01-16-2009, 11:48 AM

did you seal the wall off around the edges?

DBfan187

01-16-2009, 11:49 AM

It shouldn't matter much at all.

mcsoul

01-16-2009, 11:50 AM

What's the port size?

Is it a sealed box/wall?

bvr_j_0969

01-16-2009, 11:51 AM

maybe i was expecting to much from these? it seems like my last setup with 6 re 8's in a standard cab was louder? but its been a while since ive had bass in a vehicle?

bvr_j_0969

01-16-2009, 11:51 AM

the port is 7X23 25.5" long

Ford302Redneck

01-16-2009, 11:52 AM

4 15s in a wall, should be decently loud, no matter what 15s.

bvr_j_0969

01-16-2009, 11:53 AM

hell with that airspace, and the port size it just shows my box is tuned to just shy of 32 hz

mcsoul

01-16-2009, 11:53 AM

How many cubic feet?

bvr_j_0969

01-16-2009, 11:53 AM

maybe it is just me?

PaulThompson229

01-16-2009, 11:54 AM

4 15s in a wall, should be decently loud, no matter what 15s.

X2, there is something wrong with the install imo

Are the subs wired out of phase? Receving enough power?

bvr_j_0969

01-16-2009, 11:54 AM

i was shooting for 2.5 per sub 10 cft net

Rashaddd

01-16-2009, 11:55 AM

you probably wont even hear a difference at all

bvr_j_0969

01-16-2009, 11:55 AM

im pretty sure they are all in phase, 2 ohms and they should be getting 325 rms per sub (rated at 300 rms)

PaulThompson229

01-16-2009, 11:56 AM

i was shooting for 2.5 per sub 10 cft net

Thats actually kind of small for 15"s, that extra airspace is probably helping more than hurting you.

slumpin18

01-16-2009, 11:56 AM

we need pictures!

DBfan187

01-16-2009, 11:58 AM

what subs?

bvr_j_0969

01-16-2009, 11:59 AM

the sr's minimum airspace ported was 2.5 cft max was 3 cft that was the reason i chose them , so i wouldnt loose alot of legroom

Ford302Redneck

01-16-2009, 11:59 AM

yeah, 2.5 per sub ported is tiny.

They need at least 3-3.5.

Oh well.

But still even, it should be "loud".

bvr_j_0969

01-16-2009, 11:59 AM

what subs?

RE audio SR 15's

bvr_j_0969

01-16-2009, 12:02 PM

But still even, it should be "loud".

it is loud but like i said just seems like my re 8's did the same job.

i might have been expecting to much out of them i will try to get a video and pics tomorrow

DBfan187

01-16-2009, 12:05 PM

I would've went sealed, 8.5cF.

Ford302Redneck

01-16-2009, 12:06 PM

i mean decently loud.

blackbonnie

01-16-2009, 12:10 PM

pics?

groundpound4200

01-16-2009, 12:10 PM

http://i47.photobucket.com/albums/f159/hooperm/ummyeah.jpg

mcsoul

01-16-2009, 12:12 PM

I have to agree with the possibility that your wired out of phase between two or more subs.

bvr_j_0969

01-16-2009, 12:27 PM

pics and vids tomorrow and i will also take the subs out and check to make sure they are wire in phase right. hell you guys might be right with 8 voicecoils to wire up i could have messed one or two up

grassroots

01-16-2009, 12:33 PM

double check your amps and wiring? head unit settings?

bamaboy

01-16-2009, 12:49 PM

easy answer to this, just take a drill battery and "pop" all the subs to check polarity, as long as they are going the same you should be good

i remember saying before 2.5cubes is small, but if they reccommend it i cant argue since ive never used them

DBfan187

01-16-2009, 12:50 PM

9v battery will work also

bball09124

01-16-2009, 12:56 PM

9v battery will work also

Or any battery.....

I'd be willing to be some of the coils are out of phase as well.

bvr_j_0969

01-16-2009, 02:36 PM

they are in phase. according to the battery test

mcsoul

01-16-2009, 03:50 PM

they are in phase. according to the battery test

Should slam, not sure what's going on.

99grandprixGT

01-16-2009, 09:22 PM

mabye i missed it but what amp/s you running?

hoodkid

01-16-2009, 09:27 PM

im pretty sure they are all in phase, 2 ohms and they should be getting 325 rms per sub (rated at 300 rms)
what amp are you even running

bvr_j_0969

01-17-2009, 02:30 AM

hifonics bxi2008d

i think i might just be deaf or something because tonight on my way home from work, it blew both my drivers door and my 3rd door open to the safety latch? but i did have my windows up.

Twistid

01-17-2009, 02:35 AM

Only a 2kw amp on 4 15's ? I'm running 3kw on 2 12's ...

Eugenics

01-17-2009, 02:36 AM

Heres a thought, your expectations are too high.

bvr_j_0969

01-17-2009, 02:37 AM

Only a 2kw amp on 4 15's ? I'm running 3kw on 2 12's ...

they are rated at 300 rms

Twistid

01-17-2009, 02:38 AM

they are rated at 300 rms

Well, then what more do you expect?

DBBOOM

01-17-2009, 02:40 AM

hifonics bxi2008d

i think i might just be deaf or something because tonight on my way home from work, it blew both my drivers door and my 3rd door open to the safety latch? but i did have my windows up.

You're saying it blew the doors open to the 2nd latch? With 2000w?

bones22

01-17-2009, 02:48 AM

hifonics bxi2008d

i think i might just be deaf or something because tonight on my way home from work, it blew both my drivers door and my 3rd door open to the safety latch? but i did have my windows up.